My recommendation is a small thing: a trashcan with a swinging lid!
Covers the trash, reduces smells, will prevent trash tetris (sometimes), and very good instead of foot-pedal opening trash cans or trash cans put in a cupboard.
Another thing are toothbrush holders that stick to mirrors. Might jog that memory of needing to brush your teeth!
Wall-mounted keyholder by your door, too. Anything I put on a flat surface will eventually be lost or covered with more junk & papers. My keys are WALL-ONLY!!!
What item(s) have helped you with your struggles?
They don’t stick that well to curved surfaces. They are also quite bulky, and we tend to pack cans into the cupboard quite tightly. If I could find some magnetic sheet with enough field strength, that could work. Unfortunately all the ones I’ve found are… lackluster.
I’ll figure out a good workable solution eventually.